Remove any pruned block & undo files that are still on disk. This could happen on some systems if the file was still being read while unlinked, or if we crash before unlinking.
Declared in <node/blockstorage.h>
[[requires_capability(0x7fd7532b03a8), requires_capability(0x7fd74e9c72f8), requires_capability(0x7fd75a26b048), requires_capability(0x7fd74f16e4c8), requires_capability(0x7fd74a00db68), requires_capability(0x7fd753265478)]]
void
ScanAndUnlinkAlreadyPrunedFiles();